Chapter 15, Problem 15.101QP

Interpretation Introduction

Interpretation:

The behavior with water by writing Bronsted-Lowry acid base reactions of bicarbonate ion and also amphiprotic property by selecting a common strong acid and base to react with bicarbonate ion has to be illustrated.

Concept introduction:

Amphiprotic:

A molecule either by donating or accepting a proton, which will act as either as an acid or a base and this molecule is said to be amphiprotic.

For this property, water, amino acids, hydrogen carbonate ions and hydrogen sulfate ions are examples.

Answer to Problem 15.101QP

Illustration of amphiprotic behavior of bicarbonate ion with water is

${\text{HCO}}_{\text{3}}{{}^{\text{-}}}_{\text{(aq)}}{\text{ + H}}_{\text{2}}{\text{O}}_{\text{(l)}}\stackrel{}{\rightleftharpoons }{\text{H}}_{\text{3}}{\text{O}}^{\text{+}}{}_{\text{(aq) }}{\text{+ CO}}_{\text{3}}{{}^{\text{2-}}}_{\text{(aq)}}$

${\text{HCO}}_{\text{3}}{{}^{\text{-}}}_{\text{(aq)}}{\text{ + H}}_{\text{2}}{\text{O}}_{\text{(l)}}\stackrel{}{\rightleftharpoons }{\text{H}}_{\text{2}}{\text{CO}}_{\text{3(aq)}}{\text{ + OH}}^{\text{-}}{}_{\text{(aq)}}$

A common strong acid and base to react with the bicarbonate ion is

${\text{HCO}}_{\text{3}}{{}^{\text{-}}}_{\text{(aq)}}{\text{ + Na}}^{\text{+}}{}_{\text{(aq)}}{\text{ + OH}}^{\text{-}}{}_{\text{(aq)}}\stackrel{}{\rightleftharpoons }{\text{Na}}^{\text{+}}{}_{\text{(aq)}}{\text{ + CO}}_{\text{3}}{{}^{\text{2-}}}_{\text{(aq)}}{\text{ + H}}_{\text{2}}{\text{O}}_{\text{(l)}}$

${\text{HCO}}_{\text{3}}{{}^{\text{-}}}_{\text{(aq)}}{\text{ + H}}^{\text{+}}{}_{\text{(aq)}}{\text{ + Cl}}^{\text{-}}{}_{\text{(aq)}}\stackrel{}{\rightleftharpoons }{\text{H}}_{\text{2}}{\text{O}}_{\text{(l)}}{\text{ + CO}}_{\text{2(g)}}{\text{ + Cl}}^{\text{-}}{}_{\text{(aq)}}$

Explanation of Solution

Illustration of amphiprotic behavior of bicarbonate ion with water by writing Bronsted-Lowry acid base reactions are

${\text{HCO}}_{\text{3}}{{}^{\text{-}}}_{\text{(aq)}}{\text{ + H}}_{\text{2}}{\text{O}}_{\text{(l)}}\stackrel{}{\rightleftharpoons }{\text{H}}_{\text{3}}{\text{O}}^{\text{+}}{}_{\text{(aq) }}{\text{+ CO}}_{\text{3}}{{}^{\text{2-}}}_{\text{(aq)}}$

${\text{HCO}}_{\text{3}}{{}^{\text{-}}}_{\text{(aq)}}{\text{ + H}}_{\text{2}}{\text{O}}_{\text{(l)}}\stackrel{}{\rightleftharpoons }{\text{H}}_{\text{2}}{\text{CO}}_{\text{3(aq)}}{\text{ + OH}}^{\text{-}}{}_{\text{(aq)}}$

Bicarbonate ion can react with sodium ion for base presence and hydrogen ion for acid presence can be illustrated as fallows.

${\text{HCO}}_{\text{3}}{{}^{\text{-}}}_{\text{(aq)}}{\text{ + Na}}^{\text{+}}{}_{\text{(aq)}}{\text{ + OH}}^{\text{-}}{}_{\text{(aq)}}\stackrel{}{\rightleftharpoons }{\text{Na}}^{\text{+}}{}_{\text{(aq)}}{\text{ + CO}}_{\text{3}}{{}^{\text{2-}}}_{\text{(aq)}}{\text{ + H}}_{\text{2}}{\text{O}}_{\text{(l)}}$

${\text{HCO}}_{\text{3}}{{}^{\text{-}}}_{\text{(aq)}}{\text{ + H}}^{\text{+}}{}_{\text{(aq)}}{\text{ + Cl}}^{\text{-}}{}_{\text{(aq)}}\stackrel{}{\rightleftharpoons }{\text{H}}_{\text{2}}{\text{O}}_{\text{(l)}}{\text{ + CO}}_{\text{2(g)}}{\text{ + Cl}}^{\text{-}}{}_{\text{(aq)}}$

Conclusion

Illustration of amphiprotic behavior of bicarbonate ion with water was

${\text{HCO}}_{\text{3}}{{}^{\text{-}}}_{\text{(aq)}}{\text{ + H}}_{\text{2}}{\text{O}}_{\text{(l)}}\stackrel{}{\rightleftharpoons }{\text{H}}_{\text{3}}{\text{O}}^{\text{+}}{}_{\text{(aq) }}{\text{+ CO}}_{\text{3}}{{}^{\text{2-}}}_{\text{(aq)}}$

${\text{HCO}}_{\text{3}}{{}^{\text{-}}}_{\text{(aq)}}{\text{ + H}}_{\text{2}}{\text{O}}_{\text{(l)}}\stackrel{}{\rightleftharpoons }{\text{H}}_{\text{2}}{\text{CO}}_{\text{3(aq)}}{\text{ + OH}}^{\text{-}}{}_{\text{(aq)}}$

A common strong acid and base to react with the bicarbonate ion was

${\text{HCO}}_{\text{3}}{{}^{\text{-}}}_{\text{(aq)}}{\text{ + Na}}^{\text{+}}{}_{\text{(aq)}}{\text{ + OH}}^{\text{-}}{}_{\text{(aq)}}\stackrel{}{\rightleftharpoons }{\text{Na}}^{\text{+}}{}_{\text{(aq)}}{\text{ + CO}}_{\text{3}}{{}^{\text{2-}}}_{\text{(aq)}}{\text{ + H}}_{\text{2}}{\text{O}}_{\text{(l)}}$

${\text{HCO}}_{\text{3}}{{}^{\text{-}}}_{\text{(aq)}}{\text{ + H}}^{\text{+}}{}_{\text{(aq)}}{\text{ + Cl}}^{\text{-}}{}_{\text{(aq)}}\stackrel{}{\rightleftharpoons }{\text{H}}_{\text{2}}{\text{O}}_{\text{(l)}}{\text{ + CO}}_{\text{2(g)}}{\text{ + Cl}}^{\text{-}}{}_{\text{(aq)}}$